1851313 has 2 divisors, whose sum is σ = 1851314. Its totient is φ = 1851312.

The previous prime is 1851301. The next prime is 1851319. The reversal of 1851313 is 3131581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1827904 + 23409 = 1352^2 + 153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1851313 is a prime.

It is equal to p₁₃₈₆₂₂ and since 1851313 and 138622 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1851319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925656 + 925657.

It is an arithmetic number, because the mean of its divisors is an integer number (925657).

2^1851313 is an apocalyptic number.

It is an amenable number.

1851313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851313 is an equidigital number, since it uses as much as digits as its factorization.

1851313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1851313 is about 1360.6296336623. The cubic root of 1851313 is about 122.7891379160.

Adding to 1851313 its reverse (3131581), we get a palindrome (4982894).

The spelling of 1851313 in words is "one million, eight hundred fifty-one thousand, three hundred thirteen".